diff --git a/New_College.Api/Controllers/OAuthController.cs b/New_College.Api/Controllers/OAuthController.cs
index bd9a5e2..c1fa122 100644
--- a/New_College.Api/Controllers/OAuthController.cs
+++ b/New_College.Api/Controllers/OAuthController.cs
@@ -52,7 +52,7 @@ namespace New_College.Controllers
                         client_secret = CasdoorConfig.ClientSecret
                     }),
                     Encoding.UTF8, "application/json"));//
-            if (userinfo.code == 200 && userinfo.type == "success")
+            if (userinfo != null && userinfo.code == 200 && userinfo.type == "success")
             {
                 var user = (await _CustomerInfoServices.Query(q => q.UUID == userinfo.result.UnionId)).FirstOrDefault();
                 if (user != null)